A new genus of prosopid crabs (Decapoda: Brachyura: Dromiacea) from the Upper Jurassic of southern Germany

Un nuevo género de cangrejos prosópidos (Decapoda: Brachyura: Dromiacea) del Jurásico Superior del sur de Alemania

Günter Schweigert^1,*

¹ Staatliches Museum für Naturkunde, Rosenstein 1, 70191 Stuttgart, Germany.

* Corresponding author: (G. Schweirgert) This email address is being protected from spambots. You need JavaScript enabled to view it.

How to cite this article:

Schweigert, G., 2021, A new genus of prosopid crabs (Decapoda: Brachyura: Dromiacea) from the Upper Jurassic of southern Germany: Boletín de la Sociedad Geológica Mexicana, 73 (3), A030121. http://dx.doi.org/10.18268/BSGM2021v73n3a030121

ABSTRACT

A new monotypic genus and species of brachyurans, Petersbuchia thauckei n. gen. n. sp., is described from southern Germany. The holotype, an incompletely preserved carapace, was collected from a thick-bedded spongiolithic limestone of the Upper Jurassic Treuchtlingen Formation (early late Kimmeridgian, Acanthicum Zone). Petersbuchia adds to the diversification hotspot of early true crabs within the sponge-microbial magnafacies along the northern shelve of the Tethys Ocean in general and to the brachyuran fauna of the Treuchtlingen Formation in special.

Keywords: Homolodromioidea, diversification, Late Jurassic, palaeoecology, Treuchtlingen Formation, Bavaria, Germany.